- Use of a Symptom Index, CA125, and HE4 to predict ovarian cancer, Goff et al. 2007. , Cancer 109(2):221-227.
- Frequency of Symptoms of Ovarian Cancer in Women Presenting to Primary Care Clinics, JAMA, June 09, 2004 — Volume 291, No. 22
- Ovarian carcinoma diagnosis, Goff et al. (2000) Cancer 89, 2068-75
- Clinical picture of women with early stage ovarian cancer, Eltabbakh et al. (1999) Gyn. Onc. 75, 476-479
- National Cancer Institute
- Medline Plus, a service of U.S. National Library of Medicine, National Institutes of Health
- Johns Hopkins Pathology
- Mayo Clinic